---
product_id: 425031864
title: "MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up"
brand: "mindware"
price: "609.84 DT"
currency: TND
in_stock: true
reviews_count: 9
category: "Mind Ware"
url: https://www.desertcart.tn/products/425031864-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building
store_origin: TN
region: Tunisia
---

# Create dynamic marble runs & chain reactions Includes 16-page illustrated idea book 178 precision-cut wooden planks MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up

**Brand:** mindware
**Price:** 609.84 DT
**Availability:** ✅ In Stock

## Summary

> 🧩 Unlock your child’s inner architect with every plank!

## Quick Answers

- **What is this?** MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up by mindware
- **How much does it cost?** 609.84 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/425031864-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building)

## Best For

- mindware enthusiasts

## Why This Product

- Trusted mindware brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **No Fuss, Just Build:** Precision-cut planks stack perfectly—no glue or connectors needed for seamless creativity.
- • **All-In-One Creative Kit:** 191 pieces including balls, bell, bowling pin & toy car for endless unique builds.
- • **Build Epic Chain Reactions:** Design tunnels, ramps & contraptions that trigger satisfying marble-triggered events.
- • **Boost Teamwork & Imagination:** Perfect for kids 7+, fostering collaboration and architectural design skills.
- • **Master STEM Concepts Hands-On:** Explore balance, leverage, geometry & physics through creative play.

## Overview

The MindWare KEVA Contraptions Reactions set features 178 precision-cut wooden planks plus 13 unique accessories, enabling kids aged 7 and up to build intricate marble runs and chain reaction machines. This STEM-focused toy promotes hands-on learning in physics and engineering without the need for glue or connectors, supported by a 16-page idea book to spark creativity and teamwork.

## Description

desertcart.com: MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up : Toys & Games

Review: Best chain reaction set - Super fun, kids ages 7 and 3 love making chain reactions and building with these. I love that keva planks are cut so precisely, they balance effortlessly.
Review: Creative toy - no batteries required - Was given as a gift to a 10 year old boy. He loved building and creating with it. It has a lot of materials in a small box. Was surprised when he created a domino run almost 12 feet long.

## Features

- STEM Toys That Teach: These KEVA blocks help kids gain first-hand experience with balance, leverage, geometry and the principles of physics while fostering an interest in architecture and design
- Create Chain Reactions: Use the wooden building planks to build a marble run full of tunnels, ramps and other contraptions, then see if your KEVA ball sets off chain reactions like knocking over a bowling pin or ringing a bell
- Unique Plank Building Block Set: This wood building set features traditional KEVA planks along with colored building planks and unique pieces to create one-of-a-kind KEVA ball run structures
- No Hassle: These premium KEVA STEM planks are precision-cut from beautiful wood to stack perfectly time after time, no glue or connectors needed; simply unpack and build impressive KEVA structures
- KEVA Contraptions Reactions includes 178 wooden planks for building, 8 dowels, 2 reaction balls, 1 bell, 1 string, 1 bowling pin, 1 toy car and a 16-page illustrated idea book (Ages 7 and up)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09J69CHVP |
| Additional Features | No glue or connectors required. |
| Age Range Description | Kid |
| Best Sellers Rank | #81,667 in Toys & Games ( See Top 100 in Toys & Games ) #2,615 in Toy Building Sets |
| Brand Name | MindWare |
| Customer Reviews | 4.6 out of 5 stars 79 Reviews |
| Educational Objective | Team Building Skills |
| Item Weight | 5.5 pounds |
| Manufacturer | MindWare |
| Manufacturer Part Number | 14100193 |
| Manufacturer recommended age | 8 years and up |
| Material Type | Wood |
| Model Name | Contraptions Reactions |
| Model Number | 14100193 |
| Number of Pieces | 178 |
| Operation Mode | manual |
| Set Name | KEVA Contraptions Reactions |
| Sub Brand | KEVA Contraptions |
| Target Audience | Kids aged 7 and up |
| Theme | Architecture |
| Toy Building Block Type | Stacking Toy Building Block |
| UPC | 195130261329 |
| Unit Count | 191 Count |

## Images

![MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up - Image 1](https://m.media-amazon.com/images/I/71e1Qp3SLvL.jpg)

## Questions & Answers

**Q: How is the Contraptions Reactions set different from standard KEVA planks?**
A: Beyond 178 wooden planks, you get reaction pieces—bells, dowels, a bowling pin, string, balls, and more—to trigger chain-reaction events.

**Q: What will my child learn?**
A: Hands-on lessons in balance, leverage, geometry, force and motion while they experiment with cause-and-effect.

**Q: Do the planks require glue?**
A: No, precision-cut wood stacks perfectly—kids can redesign contraptions endlessly.

**Q: What ages is it for?**
A: Suggested for ages 7 +—challenging enough for tweens but still safe and open-ended.

**Q: Does it come with build ideas?**
A: Yes, a 16-page illustrated idea book jump-starts creative marble-run and chain-reaction challenges.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best chain reaction set
*by D***A on May 13, 2026*

Super fun, kids ages 7 and 3 love making chain reactions and building with these. I love that keva planks are cut so precisely, they balance effortlessly.

### ⭐⭐⭐⭐⭐ Creative toy - no batteries required
*by K***K on December 14, 2025*

Was given as a gift to a 10 year old boy. He loved building and creating with it. It has a lot of materials in a small box. Was surprised when he created a domino run almost 12 feet long.

### ⭐⭐⭐⭐⭐ Fun building set for kids
*by V***A on October 1, 2024*

My 11 year old started building these blocks at his school and I decided to get him a set for his birthday. He is having so much fun with it. And I am glad it keeps him away from tv. Quality is great, it can be used in so many different constructions. Totally worth the price.

## Frequently Bought Together

- MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up
- KEVA Structures 200 Wood Building Planks Set - Building Toy Includes 200 Wooden Blocks and Idea Book - Ages 5 and Up
- MindWare Keva Brain Builders Deluxe: STEM Building Toy Includes 75 KEVA Planks, 40 Puzzle Cards, 8 Design Cards, 3D Building Skills for Kids - Ages 7+

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-09*